BOSTON -- Shane Victorino is out of the starting lineup for the second time since he was activated off of the disabled list on April 24.

Jackie Bradley Jr. will get the start in right field against the A's, and Grady Sizemore will take over the duties in center field.

Xander Bogaerts will hit in the second spot in the order -- Victorino's customary spot.

Red Sox manager John Farrell explained his reasoning for keeping out of the lineup on Saturday against A's lefty starter Tommy Milone.

"Three games in two days," Farrell said. "Still looking at the shortened spring training, the number of games missed coming out of the start of the season. He's available for defense or pinch-hit duty later today and will be back on the field later tomorrow."

Victorino's most recent day off came on April 27 with the Red Sox playing on the artificial turf in Toronto.

Bradley Jr. and Sizemore have played center and right, respectively, in recent contests at Fenway. Asked how he decided on Saturday's combination, Farrell explained that Fenway's expansive right field will allow for Bradley Jr. -- the overall better defensive player -- to utilize his range. Bradley Jr.'s superior arm strength may also benefit the Red Sox in right, Farrell said.

"We've had the alignment to be the opposite in previous games," Farrell said. "The arm strength of Jackie in right field is a factor in that, and we still feel like right field might be the most important position in this ballpark. His range lends to that."

Phil Perry serves as a general reporter for Comcast SportsNet, mainly covering the New England Patriots. Follow Phil on Twitter here.